Divalent β-diketiminate lanthanide complexes LYbR(THF)(L={(2,6-Me2C6H3)NC(Me)}2CH;R=C9H7(1),CH3C5H4(2),OC6H2-But2-2,6-Me-4(32))were synthesized by reducing the mixed-ligand trivalen(t) β-diketimina...Divalent β-diketiminate lanthanide complexes LYbR(THF)(L={(2,6-Me2C6H3)NC(Me)}2CH;R=C9H7(1),CH3C5H4(2),OC6H2-But2-2,6-Me-4(32))were synthesized by reducing the mixed-ligand trivalen(t) β-diketiminate ytterbium chlorides synthesized in situ with Na-K alloy.These divalent lanthanide complexes exhibit good catalytic activity for the ring opening polymerization of ε-caprolactone.展开更多
文摘Divalent β-diketiminate lanthanide complexes LYbR(THF)(L={(2,6-Me2C6H3)NC(Me)}2CH;R=C9H7(1),CH3C5H4(2),OC6H2-But2-2,6-Me-4(32))were synthesized by reducing the mixed-ligand trivalen(t) β-diketiminate ytterbium chlorides synthesized in situ with Na-K alloy.These divalent lanthanide complexes exhibit good catalytic activity for the ring opening polymerization of ε-caprolactone.
文摘以氨基磺酸为催化剂,对以环己酮和1,2-丙二醇为原料合成环己酮1,2-丙二醇缩酮进行了研究。较系统地研究了酮醇摩尔比,催化剂用量,反应时间诸因素对收率的影响。最佳反应条件为:n(酮)∶n(醇)=1∶1.5,催化剂用量为1 g,带水剂环己烷15 mL,反应时间60 m in。上述条件下,环己酮1,2-丙二醇缩酮的收率可达71.15%。